We begin here with a new tragedy in the nfl tonight. A dallas cowboys player charged with manslaughter after police say he was driving drunk and crashed. It is the second horrible headline for the nfl in a week. Tonight, that lineman for the cowboys, josh brent, is under arrest. His teammate, jerry brown, who was this the car with him, died in the accident. One week to the day of the murder-suicide involving jovan belcher. This evening, newly released surveillance video of him. John schriffen on both cases. He begins here with the new arrest. Reporter: A late night of drinking and driving leads to the death of a dallas cowboys player. His teammate now under arrest, charged with manslaughter while intoxicated. 24-year-old josh brent, a defensive lineman was speeding down a service road inner ring is, texas, when his vehicle hit a curb, flipped over, killing the passenger, 25-year-old linebacker jerry brown. When the officers arrived on scene, mr. Bnt was dragging mr. Brown from the vehicle. Reporter: This comes one week after kansas city chiefs linebacker jovan belcher killed his girlfriend, kasandra perkins before turning the gun on himself at the team's practice facility. You were visiting somebody at these apartments? This newly released video taken hours before the vicious murder shows police responding to a 911 call about a suspicious man sleeping in his car for more than two hours. Do you live here? You need to go upstair, dude. We're trying to cut you a break. Reporter: According to reports, belcher was out with another woman that night before falling asleep in his bentley. This video shows an officer carefully approaching the suicide scene outside the chiefs stadium. I have cars everywhere kind of staging. I'm just trying to get an eye from afar. Reporter: The question now, could perkins' death and bel belcher's suicide have been prevent prevented? At 3:00 a.M., Officers had no grounds to arrest him. With no signs of alcohol and not breaks any laws. Josh brent is due in court tomorrow. His team is expected to play in cincinnati sunday. David? A troubling week in the nfl, john, thank you.

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